Improvement in set-gears for saw-mills



H. GAWLEY. SET-GEAR FOR SAW-MILLS.

Patented Jul 3,1877.

ITED STATES ATENT IMPROVEMENT IN SET-GEARS FOR SAW-MILLS.

Specification forming part of Letters Patent No. 92,576, dated July 3,1877 application filed February 13, 1877.

To all whom it may concern:

Be it known that I, HECTOR GAWLEY, of the township of Maidstone, in thecounty of Es=ex, in the Province of Ontario, Canada, have invented aSet-Gear for Saw-Mills, of which the following is a specification:

The object of my invention is to set the log to be sawed in acircular-saw mill forward to the saw the required distance for differentthicknesses of lumber more accurately than can be done by the commondevice of a ratchet and pawl, and to hold the log in the position towhich it is set by means of levers G and D, friction'wheel A, blocksffff, and spring.

E, as shown in the perspective yiew, Figure 1., of the accompanyingdrawing; and also for releasing the friction-wheel A by means of lever Gand cam I, Fig. 2, to allow it to be rotated freely in any directionwhen required to put a log on the blocks.

The wheel A is formed of a web and rim or flange at its periphery, asshown in Fig. 3 ot' the accompanying drawing, which is a section ofwheel. Theblocksff andffaremadetofit accurately the outer and innerperiphery of rim L, and are attached in the forked ends of levers G andD by pins or bolts, on which they move freely, and when the levers O andD are in line with the center of wheel A there is about a sixteenth ofan inch play, so that when a pressure is brought to bear on the outerend of levers U or D the blocksff andff hug the rim L of wheel A, and,if the pressure is continued, rotate it, and with it the shaft on whichit is fastened, carrying the boot and log forward to the saw, thedistance being determined by the length of are through which the levertravels, and which may be regulated by a quadrant and pin, or anyconvenient device. The lever D has its fulcrum at h, and by means ofspring E holds wheel A in the position in which it is placed by themoving of lever 0, except when it is required to release it, which isdone by depressing lever G to the position indicated by dotted lines inFig. 2, and throwing up cam I, so as to slightly raise the inner orforked end of lever O and blocks f f, when the wheel A may be freelyrotated in either direction.

[claim as my invention- 1. The combination of wheel A, levers G and D,blocksff'ff, and spring E, for the purpose of setting'the log toward thesaw in saw-mills, and for holding the same in position when so setforward.

2. The combination of lever G, cam I, and connection K, for releasingthe wheel A, so that it may be rotated in either direction, as required.

HECTOR GAWLEY.

FFICE.

